Apparatus for spraying or squirting metal



July 27, 1937.

H. SCHLJ'JPMANN Filed Jan. 20, 1934 2 Sheets-Sheet 1 wvavroga z I 2 I By 7 I m'nm N55 E5? .:::::::E :2. HEE:

APPARATUS FOR SPRAYING OR SQUIRTING' METAL July 27, 1937. H. SC HLUPMANN APPARATUS FOR SPRAYING QR SQUIRTING METAL Filed Jan. 20, 1934 2Sheets-Sheet 2 Fig.5

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rm/e NEy Patented July 27, 1937 UNITED STATES.

PATENT OFFICE Heinrich Schliipmann, Berlin-Niederschone- Germany weide,

Application January 20, 1334, Serial No. 707,521

Germany January 20, 1333 Claims. My invention relates to improvements in apparatus for spraying or squirting metal, and.

more particularly in apparatus for applying a thin coating of metalto objects for preventing Other objects of the improvements will appearfrom the following description.

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawings in which the same 30 reference characters have been used in all the views to indicate corresponding parts. 'In said drawings,

Fig. 1 is a sectional elevation of the apparatus,

Fig. '2 is a sectional plan view taken on the line 2--2 of Fig. 1,

Fig. 3 is a sectional elevation on an enlarged scale-taken on the line 33 of Fig. 1 and showing the top part of the squirting device, v

Fig. 4 is a fragmentary sectional elevation on an enlarged scale and on the same plane of section, showing thedelivery end of the squirting device, and 1 Fig. 5 is-a sectional plan view on an enlarged scale taken on the line 4-4 of Fig. 1.

Fig. 6 is a fragmentary view in vertical section, showing to larger scale a portion of the apparatus as seen in Fig. 1.

In the examples shown in the drawings the machine comprises a base I which preferably is 3 made hollow, and which is formed with a horizontally disposed work-supporting plate penetrated by one or more holes 2 and adapted to have the objects to be coated placed thereon. Ordinarily the said objects, for example cylinders. 45.are hollow, and they are placed with their axis or axes vertically on the base I and surrounding the holes 2 thereof. The base i is formed at one side with an opening 3 which may be connected with an exhauster for drawing air through the 50 object or objects placed on the hole or holes 2. Thus the gas and metal dust developed within the object or objects is withdrawn, so that it may not injure the health'of the workmen.

On the base I a pillar 4 is mounted on which 55 the spraying or squirting mechanism is vertically movable. As shown the said spraying or squirting mechanism is supported on a tubular slide 5 which'is adapted to be raised or lowered on the pillar 4 and to be held in position thereon by suitable mechanism. The said mechanism 5 comprises a worm gearing consisting of a worm 6 secured to a worm shaft 1 and a gear wheel ll engaged by said worm' and engaging a rack 8 fixed to or made integral with the pillar- 4. The said worm shaft 1 is mounted in a bearing 3 pro- 0 vided on the slide 5, and it has a crank I 0 se- I cured thereto. The slide 5 is slitted longitudinally as is shown at H and it is adapted to be clamped in adjusted position on the pillar 4 by means of screws l2 passed through eyes formed 15 on the slide 5.

At its front side the slide 5 is formed with a dove-tailed horizontal guideway l5, on which a slide I6 is movable in horizontal direction. The said slide is connected or made integral with a 20 nut I! which is engaged by a screw-threaded spindle l8 rotatably mounted in' bores l3 made at the ends of the guideway l5, the said spindle l8 carrying a crank 23. The slide I6 is made integral with a plate 2| which is formed with a 25 'a bracket 34 made integral with the plate 2| 35 'of the slide l6. Vertical displacement of the spindle relatively.to the slide 26 is prevented by means of a ring 22 mounted on the bottom part of the spindle and held in position thereon by means of a nut 23 and a cap screw 24. Thus the slide 26 is moved upwardly or downwardly on the guideway 25 when the spindle 32 is turned to the right or left.

For thus imparting rotary movementto the spindle in either direction the following vmechanism is provided: On the bottom part of the spindle 32 two bevel gearings 36 and 31 are rotatable which are engaged by a bevel gearing 33 secured to a shaft 33 mounted in suitable bear-. ings provided on the table 21. At its front end the said shaft 33 carries a worm' gearing meshing with a worm 56, and the said worm is. connected through the intermediary of gear wheels 56 with the shaft of the motor 23. Between the gear wheels 36 and 31 a coupling sleeve 55 device.

45 is mounted on the spindle 32, which is axially slidable and nonrotatable on the said spndle. The-sleeve 45 is formed at either end with coupling teeth adapted for engagement with corresponding teeth formed on the hubs of the bevel gearings 36 and 31. Thus either oneof the said gear wheels may be coupled by means of the is directed from the shaft 48 rearwardly and into position for engagement with an upper lug 5| and a lower lug 52 vertically adjustable on a rod 53 secured to the bracket 34 at 54.

The table 21 carries the spraying or squirting As shown the said squirting device comprises a hollow head 60 which is suspended from the table 21 by means of arms 59., The said head is made integral with a rod 6| which is formed with a longitudinal bore 62, and which has a tapering bottom end 63. Through the said bore a wire 58 of the metal to be squirted is passed downwardly and to the bottom end of the rod 6|, the said wire being supplied from a spool 64 mounted on a bracket 65 carried by the bracket 34 and passed through ahole 51 madev in the table 21. Within the head 60 a pair of feed rollers 66 and 61 are mounted which are in clamping engagement with the wire '58, and the roller 66 is connected by a rope 68 and pulleys 69 and 19 with the shaft of the motor 29. Thus the wire is positively fed to the squirting device.

To the rod 6| two concentric pipes 1| and 12 are secured which extend downwardly therefrom, the rod 6| and the pipe providing an annular passage 13 ending at the bottom end of the rod 6|, and the pipes 1| and 12 providing an annular passage 14 which likewise ends at the.

bottom end of the rod 6|. At their bottom ends the passages 13 and 14 taper inwardly. Near its bottomend the pipe 12 is formed with a flange 16, and on the said flange a pipe 11 is supported, through the intermediary of an anti-friction bearing 18, the said pipe 11 being guided at its top end on the pipe 12. To the bottom end of the .pipe 11 a sleeve or spraying head is socured which is formed at its bottom with an extension 8| having a cavity 82 in front of the delivery ends of the bore 62 and the passages 13 'and 14, the said cavity opening laterally so as to direct the gases and the molten metal laterally. The inner walls of the cavity 8 2 converge in the direction of the advance of a jet of flame from the passages 13 and 14.

Internally of the head 80 there is an annular passage 83 which is connected with the passage 14 through holes 84, and which is connected through a downwardly directed passage 85. with a passage 86 opening through the converging walls of the cavity 82 and into the bottom end of the cavity 82, and with a series of small bores 81 disposed around the said cavity and directed upwardly and towards the axis of the passage 86.

The annular passage 13 is connected at its top by a bore 98 made in the wall of the hollow head 60 with a tubular stud- 9| adapted to be connected with a supply of a suitablefuel such as acetylene, and it is also connected through a similar bore 92 with a tubular stud 93 adapted to be connected with a supply of oxygen, and the passage 14 is connected through a bore 94 with a similar tubular stud 95 adapted to beconnected with a supply of a compressed incombustible gas such as air. Thus mixture of acetylene and oxygen is delivered through the inner annular passage 13and around the wire 58 passed through the bore 62,

the said mixture being ignited for melting the said wire. Simultaneously compressed air is forced through the passage 14 and delivered around the annular jet of fuel delivered through the bore 13 and the wire. Further, a part of the said compressed air is forced through the annular passage 83 and the passage and it is delivered through the passage 86 into the bottom part of the cavity 82 and through the bores 81around the said cavity. The jet of burnt fuel and molten metal and compressed air is deflected laterally by the cavity 82 and it is further deflected by the jets of air delivered through the passage 86 and the bores 81. by the air and thrown from the head 80 at an angle of about relativelyto the axis thereof.

Further, the annular jet of air delivered through the annular passage 14 has a sucking action on the mixture of acetylene and oxygen, which suc-' tion prevents backfiring.

The pipe 11 is adapted to be rotated from the motor 29, and for this purpose it carries a spur gear 43 at its top .end which is in mesh with a spur gear 42 secured to a vertical shaft 4|. The said shaft is guidedin a tubular extension 44 extending downwardly from the table 21, and it is operatively connected with the shaft 39 by a bevel gearing 49. 4

In the operation of the apparatus a plate Hill is placed on the hole 2 of the base I, which plate is' formed with one or more circular holes I82, and the object to be coated such for example as the cylinder of an internal combustion engine is placed on one of the said holes- I02. The spray; ing nozzle is placed concentrically into the said cylinder by shifting the same together with the table 21 and the slide 26 laterally on the guideway I5 by means of the spindle I8 and the crank 28, and further shifting the same in vertical direction by displacing the slide 5- on the'pillar 4 by means of the gearingG, 1', 8, III. The lugs 5| and 52 are set in position on the rod 53, so that the vertical movement of the slide 26 is reversed a lar passage 14, the said compressedair being delivered through the tapering bottom part of the passage 14, the passage 86 and the bores 81.

The exhauster connected with the base I is started, so that air is drawn from the said base and through the cylinder placed thereon, so,

many of the holes I92 as are not in instant use being preferably closed by Aids placed thereon. Now the mixture of oxygen and acetylene delivered through the squirting head is ignited so as to melt the bottom end of'the wire 58, and the motor 29 is started. Thereby the slide 26, the table 21 and the parts carried thereby are moved in vertical direction, the coupling sleeve 45 being incoupling engagement with one of the bevel I gearing 36 or 31. Further, the pipe 11 is rotated Thus the molten metal is atomized Val and thrown onthe cylindrical surface to be coated, while the said head rotates and is gradually shifted upwardly and downwardly, the movement of the slide 26, the table 21 and the squirting device being automatically reversed in the desired end positions by the lugs 5| and 52, the cranks 41, 48, 49 and the coupling sleeve 45.

From the foregoing description it will be understood that the squirting nozzle has exactly regulated rotary and vertical movements imparted thereto by the positive driving mechanisms acting thereon, and that also exact lengths of wire are gradually fed through the bore 62. Therefore exactly regulated amounts of molten metal are thrown on the surface to be coated per unit of surface area, and a coating of the desired thickness is obtained.

As is shown in Fig. 2 the guideway l5 carried by the tubular slide 5 extends laterally to both sides, and the base I is likewise extended laterally. The plate lllll is formed with a plurality of holes I02 which are located so that all the cylinders of a multi-cylinder engine may be placed thereon. After one of the cylinders has been coated the squirting device is removed therefrom and shifted laterally on the guideway I5 and brought into position for acting on the next cylinder. But I wish it to be understood that a plurality of squirting devices may be provided on the guideway l5 which -may be simultaneously brought into positions for'acting on the cylinders.

In Fig. 2 I have diagrammatically indicated a second slide l6 and its guideway 25.

Instead of connecting the sucking device with the opening 3 of the base I, the said sucking device may also be connected with the hollow pillar 4.

It will be understood that the rate of the wire feeding operation may be varied, for example, by providing pulleys 69 and I0 of a different gear ratio. In a. similar way the number of revolutions of the squirting device may be varied by providing gear wheels 42, 43 of a difierent gear ratio.

I claim:

1. An apparatus for coating objects with metal,

comprising a base adapted to have a plurality of objects to be coated placed in succession thereon, a pillar rising from said base, a slide shiftable you said pillar and formed with a guideway extending in the direction of a succession of objects placed on said base, a-plurality of members shiftable on said guideway into positions near the objects placed on said base, arms borne by and shiftable on said members towards and away from said base, squirting devices mounted on said arms,

mechanism on said arms for moving the same on said members towards and away from the base and operating said squirting devices, and means for shifting said slide on said pillar towards and away from said base.

2. An apparatus for coating objects with metal,

comprising a support adapted to have an object to be coated placed thereon, a device for squirting metal mounted on said support and having means for supplying molten metal, positive means for imparting progressive movement and positive means for imparting rotary movement to said squirting device across the surface to be coated, and operating means positively connected both' with said metal-supplying means and with the means for imparting progressive movement and the means for imparting rotary movement to the squirting device, for simultaneously moving the same.

3. An apparatus for coating objectsflwith metal comprising a base adapted to have an object to be coated placed thereon, an upright member mounted on said base, a slide mounted on said upright member, a metal-squirting device mounted on said slide in position for squirting metal on the surface of the object placed, on said base,

a motor, a screw-threaded spindle and its nut adapted when rotated to-move said slide on said member, gear wheels intermediate said motor and said screw-threaded spindle for imparting rotary movementthereto, mechanism intermediate said motor and said squirting device for imparting rotary movement thereto, and mechanism for feedmounted on said base, a slide mounted on said upright member, a metal-squirting device mounted on said slide in position for squirting metal on the surface of the object placed on said base, a screw-threaded spindle and its nut for moving said slide, a beveled driving gear wheel connected with said motor, a pair of driven beveled gear wheels in mesh with said driving gear wheel and adapted to be rotated thereby in opposite directions and mounted on said screw-threaded spindle, and a clutch adapted selectively to connect said driven gear wheels with saidspindle.

5. An apparatus for coating objects with metal comprising a base adapted to have an object to be coated placed thereon, an upright member mounted on said base, a slide mounted on said upright member, a metal-squirting device mounted on said slide in position for squirting metal on the surface of the object placed on said base, a

screw-threaded spindle and its nut for moving said slide, a beveled driving gear wheel connected with said motor, a pair of beveled driven gear wheels in mesh with said driving gear wheel and adapted to be rotated therebyin opposite directions and mounted on said screw-threaded spindle, a clutch adapted selectively to connect said driven gear wheels with said spindle, mechanism for shifting said clutch into engagement with either one of said driven gear wheels, and stops mounted on said member in positions for enaging said mechanism and shifting said clutch.-

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